我收到通知说我的桌面安装有更新，但我无法这样做。我看不到真正的错误消息。我已经运行了sudo apt autoremove、sudo apt upgrade和sudo apt install，它给出了0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded。这是我运行时的屏幕do-release-upgrade：
Reading cache
Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done
Hit http://us.archive.ubuntu.com/ubuntu xenial InRelease
Hit http://archive.canonical.com xenial InRelease
Hit http://security.ubuntu.com/ubuntu xenial-security InRelease
Fetched 0 B in 0s (0 B/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
Restoring original system state
Aborting
Reading …